关于实现图表绘制类，支持柱状图，饼图，折线图等的程序设计 　-on the realization of mapping class support column, pie charts and other dogleg Program Design

6款VB专用的曲线图、柱状图控件，每个都含有示例，用起来挺方便，这些曲线图有的是根据数据库数据生成-6 VB specific curves, histogram controls, each containing sample, very convenient to use these curves to generate some data based on database